We've updated the Group Policy for all workstations and they are still being prompted.

It's possible the system was already configured to display the notification update prior to disabling updates. For Notification Updates, when an update is encountered Flash Player creates the following two registry entries:

The presence of the RunOnce > FlashPlayerUpdate entry triggers the Notification Update to display upon logging into the system. If these entries (especially the RunOnce > FlashPlayerUpdate) do not exist the Notification Update prompt does not display. You can write a script to periodically check if these entries exist on the system and if they do, delete them.

Note that the AutoUpdateDisable setting in the mms.cfg file is reset to the default setting of AutoUpdateDisable=0 when Flash Player is uninstalled. If your deployment strategy involves uninstalling Flash Player before installing the new version this option will be reset and you'll need to deploy the custom mms.cfg file again disabling Flash Player Update Notification (AutoUpdateDisable=1) after installing the new version of Flash Player.

Flash Player version installed (previous version installed, not current version)

Upload the mms.cfg file from an impacted systems to cloud.acrobat.com/send using the instructions at How to share a file using Adobe Document Cloud and post the link to the uploaded file in your reply. I'll load it onto a test machine and test it out.

In the interim, you can perform the following troubleshooting steps:

query the systems to see if the RunOnce > FlashPlayerUpdate entry exists

If the entry does exist, verify the mms.cfg file is saved to the correct location (locations mentioned in my previous comment)

Query the contents of the mms.cfg file, does it have AutoUpdateDisable=1

Obtain mms.cfg file and upload it to cloud.acroabt.com/send and send me the URL to the uploaded file.

Thanks for the update. We haven't had a release since July 11 (2nd Tuesday of the month). The next regularly scheduled release will be August 8. If the mms.cfg file is configured correctly, and in the correct location, your users should not see the update notification prompt. I will be on vacation for the next release. If you experience issues, post back here and one of the other staff members should see it and assist you.